WO2010054547A1

WO2010054547A1 - Synchronization scheduling method

Info

Publication number: WO2010054547A1
Application number: PCT/CN2009/071748
Authority: WO
Inventors: 翟恒星; 艾建勋
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-11-13
Filing date: 2009-05-12
Publication date: 2010-05-20
Anticipated expiration: 2011-05-13
Also published as: BRPI0921895A2; EP2357770A1; EP2357770B1; EP2357770A4; BRPI0921895B8; CN101741538A; RU2460230C1; BRPI0921895B1; CN101741538B; US20110206019A1

Abstract

A synchronization scheduling method is provided. The method comprises: the appointed network element determines the scheduling transmission time interval of the service according to the length of the synchronous serial and time division multiplexing period of the service, and sends the determined scheduling transmission time interval to multiple lower layer network elements (S302); the multiple lower layer network elements execute the scheduling processing to the data packet of the service according to the scheduling transmission time interval (S304). Application of the present invention could avoid causing the interference to the MBSFN network and destroying the MBSFN condition.

Description

同步调度方法 Synchronous scheduling method

技术领域本发明涉及通信领域 , 尤其涉及一种同步调度方法。背景技术随着 Internet网络的迅猛发展，大量多媒体业务涌现出来，人们对移动通信的需求已不再满足于电话和消息业务，目前，多媒体业务中引入了应用业务，应用业务的特点是多个用户能同时接收相同的数据，例如视频点播、电视广播、视频会议、网上教育、互动游戏等。为了有效地利用移动网络资源 , 提出了多媒体广播组播业务 ( Multimedia Broadcast Multicast Service, 筒称为 MBMS )技术， MBMS为一个数据源向多个用户发送数据的点到多点业务，通过该业务，能够实现网络资源共享，包括移动核心网和接入网的资源共享，尤其是空口资源的共享， JL 3GPP中的 MBMS不仅能够实现纯文本氏速率的消息类组播和广播，而且能够实现高速率的多媒体业务组播和广播。由于 MBMS业务是面向全网的服务，同一个 MBMS业务可能建立在不同的下层网元节点上。图 1 是根据现有技术的多个网元的 MBMS业务同步处理方法的流程图，如图 1所示，该流程包括以下处理。步骤 S102, 上层网元发送 MBMS业务数据包到各下层网元，该业务数据包承载了业务数据，并携带时间戳信息、数据包序列号信息、累计的业务数据长度信息等，上层网元对一个或多个连续业务数据包标识相同的时间戳信息，这些标记了相同时间戳的数据包组成一个数据突发（ data burst ) 或者称为同步序歹' J ( synchronization Sequence )。特殊的 , 上层网元标只每个业务数据包为一个数据突发或者同步序列，此时，每个数据突发或者同步序列只包含一个业务数据包。步骤 S104, 下层网元对同一个同步序列中的业务数据包所携带的业务数据需要进行无线链路控制（ Radio Link Control, 筒称为 RLC ) 协议层串接处理，不同的同步序列的业务数据包不进行 RLC串接处理。并且，在对一个同步序列的业务数据包进行 RLC协议层处理时，从每个同步序列的第一个数据包开始，对 RLC协议层的 RLC序列号进行复位处理，也就是说，从每个同步序列的第一个数据包的第一个 RLC协议数据单元（ Protocol data unit, 筒称为 PDU )开始， RLC序列号从某个约定或者配置的固定值开始分配。这样丈的好处是为了在出现上层网元到下层网元的传输过程中 , 出现多个连续数据包的丢失时 , 下层网元根据现有技术不能判断丢失的数据包在进行 RLC 处理时占用的 RLC PDU的长度 , 从而造成出现丢包的网元不能和其它网元保持后续 RLC处理的一致。在每个同步序列的开始复位 RLC序列号可以避免上述问题，保证在每个同步序列开始，每个网元的 RLC序列号都是一致的。步骤 S106, 下层网元对同一个同步序列中的业务数据包所携带的业务数据在其标识的时间戳对应的发送时机开始在无线接口依次发送业务数据包，由于上层网元发送到各下层网元的上述信息完全一致，各下层网元可以进行完全一致的处理，这样就实现了 MBMS 业务在各下层网元的小区间同步发送。目前，可以通过下述两种方式设置每个数据包的时间戳信息。方式一，在上层网元才艮据其接收到的业务数据包的时刻来标识时间戳，并对在某个特定长度时间间隔内接收到的业务数据包 , 标识相同的时间戳 , 其中，特定长度时间间隔称为同步序列长度 ( synchronization sequence length ), 或者调度周期。方式二，上层网元虚拟下层网元的 RLC十办议层处理，才艮据虚拟 RLC处理的结果，对需要进行 RLC串接处理的业务数据包标识相同的时间戳。由于上述两种设置方法，时间戳信息取决于业务数据包到达上层网元的时间 , 所以业务数据包的时间戳间隔都是不确定的。假设上层网元接收到的业务数据流是才艮据业务服务质量（ Quality of Service, 筒称为 QoS )整形后的数据流，也就是在任意一段时间内 , 业务数据流的带宽不超过业务 QoS参数定义的最大带宽 ,并且假设无线接口在上述的时间段内的信道资源和 QoS参数匹配。一个 MBMS业务可以采用时分复用（ Time Division Multiplex, 筒称为 TDM ) 的方式在无线接口进行发送 , TDM配置包含如下参数： TDM周期、 TDM偏移和 TDM重复长度，一个业务可用的 TDM资源可以如下表示： (系统帧号 CFN整除传输时间间隔（ Transmission Time Interval, 筒称为 TTI ) 包含 10ms无线帧个数 ) 取模运算（ TDM周期） =TDM偏移 +i, i=0、 1The present invention relates to the field of communications, and in particular, to a synchronous scheduling method. BACKGROUND With the rapid development of the Internet network, a large number of multimedia services emerge, and the demand for mobile communication is no longer satisfied with the telephone and message services. Currently, the application service is introduced in the multimedia service, and the application service is characterized by multiple users. Can receive the same data at the same time, such as video on demand, TV broadcast, video conferencing, online education, interactive games, etc. In order to effectively utilize mobile network resources, a Multimedia Broadcast Multicast Service (MBMS) technology is proposed. MBMS is a point-to-multipoint service in which data is sent to multiple users by a data source. It can realize network resource sharing, including resource sharing between mobile core network and access network, especially the sharing of air interface resources. MBMS in JL 3GPP can not only realize message-like multicast and broadcast of pure text rate, but also achieve high rate. Multimedia services for multicast and broadcast. Since the MBMS service is a service for the entire network, the same MBMS service may be established on different lower-layer network element nodes. FIG. 1 is a flowchart of a method for processing MBMS service synchronization of multiple network elements according to the prior art. As shown in FIG. 1, the process includes the following processing. Step S102: The upper layer network element sends the MBMS service data packet to each lower layer network element, where the service data packet carries the service data, and carries the timestamp information, the data packet sequence number information, the accumulated service data length information, and the like, and the upper layer network element pair One or more consecutive service packets identify the same timestamp information, and the packets marked with the same timestamp constitute a data burst or synchronization sequence. Specifically, the upper layer network element label only has one data burst or synchronization sequence for each service data packet. At this time, each data burst or synchronization sequence only includes one service data packet. Step S104: The lower layer network element needs to perform radio link control (Radio Link Control, RLC) protocol layer concatenation processing on the service data carried in the service data packet in the same synchronization sequence, and different synchronization sequence service data. The packet does not perform RLC concatenation processing. And, when performing RLC protocol layer processing on a synchronization sequence of service data packets, the first number from each synchronization sequence According to the beginning of the packet, the RLC sequence number of the RLC protocol layer is reset, that is, starting from the first RLC protocol data unit (PDU called PDU) of the first data packet of each synchronization sequence. The RLC serial number is assigned starting from a fixed value of a convention or configuration. The advantage of this is that in the transmission process of the upper layer network element to the lower layer network element, when multiple consecutive data packets are lost, the lower layer network element cannot judge that the lost data packet is occupied by the RLC processing according to the prior art. The length of the RLC PDU is such that the network element with packet loss cannot be consistent with the subsequent RLC processing of other network elements. Resetting the RLC sequence number at the beginning of each synchronization sequence avoids the above problem, ensuring that the RLC sequence number of each network element is consistent at the beginning of each synchronization sequence. Step S106: The lower layer network element sequentially sends the service data packet to the radio interface in the transmission time corresponding to the timestamp corresponding to the identifier of the service data packet in the same synchronization sequence, because the upper layer network element sends the service data packet to each lower layer network. The above information of the element is completely consistent, and the lower layer network elements can perform completely consistent processing, so that the MBMS service is synchronously transmitted between the cells of the lower layer network elements. Currently, the timestamp information of each packet can be set in the following two ways. In the first mode, the upper layer network element identifies the timestamp according to the time of the service data packet received by the upper layer network element, and identifies the same timestamp for the service data packet received in a certain length time interval, wherein, The length time interval is called the synchronization sequence length, or the scheduling period. In the second mode, the RLC ten-layer negotiation layer of the upper-layer network element virtual lower-layer network element processes, according to the result of the virtual RLC processing, identifies the same timestamp for the service data packet that needs to be subjected to the RLC concatenation process. Due to the above two setting methods, the timestamp information depends on the time when the service data packet arrives at the upper layer network element, so the timestamp interval of the service data packet is uncertain. It is assumed that the service data stream received by the upper-layer network element is a data stream that is shaped according to the quality of service (QoS), that is, the bandwidth of the service data stream does not exceed the service QoS in any period of time. The maximum bandwidth defined by the parameters, and it is assumed that the channel resources and QoS parameters of the wireless interface match within the above time period. An MBMS service can be transmitted on the radio interface by using Time Division Multiplex (TDM). The TDM configuration includes the following parameters: TDM period, TDM offset, and TDM repetition length. A TDM resource available for a service can be used. It is expressed as follows: (System frame number CFN Divide Transmission Time Interval (TTI) package Number of radio frames with 10ms) Modulo operation (TDM period) = TDM offset +i, i=0, 1

( TDM周期 -1 )。具体地，一个 MBMS业务在其分配的 TDM周期内，从第 TDM偏移个 TTI开始的，连续 TDM重复长度个调度传输时间间隔（ TTI ) 内进行发送， TDM重复周期最大为 9, MBMS业务可以使用的 TTI的长度为 40或者 80ms。一个业务只有在 TDM周期内配置的可用发送时间内才能在无线接口发送。采用了 TDM方式发送数据时，由于一个 MBMS业务在无线接口的发送时机是不连续的 , 而是按照 TDM的配置周期性循环出现，由于目前的调度方法，时间戳具有不确定性，因而时间戳信息可能不能直接对应于无线接口可以发送该 MBMS 业务的起始时间，也就是说，时间戳和无线接口发送时机（可用发送时间）不能——对应，例如，图 2所示的同步序列长度与 TDM 周期不相匹配的示意图。目前，在 MBMS同步系统中，为了实现 TDM复用条件下的业务调度，提出了下层网元按照调度传输时间间隔对接收到的同步序列进行调度的方法，其中，该调度传输时间间隔长度为业务 TDM周期和同步序列长度的公倍数 , 且下层网元将时间戳位于一个调度时间长度内的同步序列在下一个调度传输时间间隔内发送。在上述同步系统中 , 存在多个下层网元同步的以多播广播单频网络 ( Multicast Broadcast Single Frequency Network, 筒称为 MBSFN ) TDM方式发送 MBMS 业务，但根据目前的方法，多个下层网元不能获得相同的调度传输时间间隔 , 会导致不同的下层网元对同一个业务采用不同的调度方法 , 这样会对 MBSFN网络造成干 4尤，破坏 MBSFN条件。发明内容考虑到相关技术中存在的多个下层网元不能获得相同的调度传输时间间隔而导致的对 MBSFN网络造成干扰，破坏 MBSFN条件的问题而提出本发明，为此，本发明的主要目的在于提供一种同步调度方法，以解决上述问题。才艮据本发明的一个方面 , 提供一种同步调度方法。才艮据本发明的同步调度方法包括：指定网元才艮据同步序列长度和业务的时分复用周期确定业务的调度传输时间间隔 , 并将确定的调度传输时间间隔发送给多个下层网元；多个下层网元按照调度传输时间间隔对业务的数据包进行调度处理。才艮据本发明的一个方面 , 提供一种同步调度方法。才艮据本发明同步调度方法包括：多个下层网元才艮据业务的同步序列长度、时分复用周期、以及预定规则确定调度传输时间间隔；多个下层网元按照确定的调度传输时间间隔对业务的数据包进行调度处理。通过本发明提供的方法 ,进行同一业务的多个下层网元通过获得该业务的调度传输时间间隔，并对该业务采用相同的调度方法，相比于现有技术，能够避免对 MBSFN网络造成干 4尤和破坏 MBSFN条件。附图说明附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例一起用于解释本发明 , 并不构成对本发明的限制。在附图中：图 1是才艮据现有技术的多个网元的 MBMS业务同步处理方法的流程图；图 2才艮据现有技术的同步序列长度和 TDM周期不匹配的实例示意图；图 3是根据本发明方法实施例一的同步调度方法的流程图；图 4是根据本发明实施例的上层网元和下层网元的逻辑结构框架图；图 5是才艮据本发明方法实施例二的同步调度方法的流程图。具体实施方式功能相克述本发明的基本思路是：由于存在多个下层网元同步的以 MBSFN TDM 方式发送 MBMS 业务，但才艮据目前的方法，多个下层网元不能获得相同的调度传输时间间隔 , 会导致不同的下层网元对同一个业务采用不同的调度方法，基于此，本发明提供一种同步调度方法，进行同一业务的多个下层网元通过指定网元获得该业务的调度传输时间间隔，并对该业务采用相同的调度方法，来解决上述问题。下面将结合附图详细描述本发明。方法实施例才艮据本发明实施例，提供了一种同步调度方法。需要说明的是，为了便于描述，在下文中以步骤的形式示出并描述了本发明的方法实施例的技术方案，在下文中所示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。虽然在相关的附图中示出了逻辑顺序，但是在某些情况下 , 可以以不同于此处的顺序执行所示出或描述的步骤。图 3是根据本发明实施例的同步调度方法的流程图，如图 3所示，该方法包括以下步骤 (步骤 S302至步骤 S304 )。步骤 S302, 指定网元居同步序列长度和业务的时分复用周期确定业务的调度传输时间间隔 ,并将确定的调度传输时间间隔发送给多个下层网元；步骤 S304, 多个下层网元按照调度传输时间间隔对业务的数据包进行调度处理，其中，同步序列长度也可以称为调度周期。其中，指定网元包括以下之一：上层网元、除多个下层网元之外的下层网元。需要说明的是，上述的调度传输时间间隔可以是针对某个业务，也可以对所有的业务都设置相同的调度传输时间间隔。通过本发明实施例提供的技术方案 ,进行同一业务的多个下层网元通过获得该业务的调度传输时间间隔，并对该业务采用相同的调度方法，相比于现有技术 , 能够避免对 MBSFN网络造成干扰和破坏 MBSFN条件。下面通过实例一和实例二来说明指定网元为除所述多个下层网元之外的下层网元时，本发明实施例的处理过程。实例一首先，作为指定网元的下层网元通过系统配置获取指定业务的同步序列长度和时分复用周期，该下层网元根据获取的同步序列长度和业务的时分复用周期计算的得到指定业务的调度传输时间间隔 , 具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。之后 ,该下层网元通过信令消息将确定的调度传输时间间隔发送为进行上述指定业务的各下层网元 , 各下层网元按照接收到的调度传输时间间隔对接收到的业务同步序列进行调度处理。实例二首先，作为指定网元的下层网元归属的上层网元将同步序列长度通知给下层网元，并通过系统配置获取时分复用周期。该下层网元才艮据获取的同步序列长度和业务的时分复用周期计算的得到指定业务的调度传输时间间隔 , 具体地 , 可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。之后 ,该下层网元通过信令消息将确定的调度传输时间间隔发送为进行上述指定业务的各下层网元 , 各下层网元按照接收到的调度传输时间间隔对接收到的业务同步序列进行调度处理。下面通过实例三和实例四来说明指定网元为上层网元时，本发明实施例的处理过程。实例三首先 ,上层网元通过系统配置获取指定业务的所述同步序列长度和所述时分复用周期 , 该上层网元才艮据获取的同步序列长度和业务的时分复用周期计算的得到指定业务的调度传输时间间隔 , 具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。之后 ,该上层网元通过信令消息将确定的调度传输时间间隔发送为进行上述指定业务的各下层网元 , 各下层网元按照接收到的调度传输时间间隔对接收到的业务同步序列进行调度处理。实例四首先 ,作为指定网元的上层网元的下层网元将时分复用周期通知给上层网元，该上层网元可以通过系统配置获取同步序列长度。该上层网元根据获取的同步序列长度和业务的时分复用周期计算的得到指定业务的调度传输时间间隔 , 具体地 , 可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。之后 ,该上层网元通过信令消息将确定的调度传输时间间隔发送为进行上述指定业务的各下层网元 , 各下层网元按照接收到的调度传输时间间隔对接收到的业务同步序列进行调度处理。下面对上层网元和下层网元进行描述。上层网元用于完成对接收到的 MBMS业务数据包的调度，具体地 , 上层网元对各业务数据包标记时间戳信息，并将标记了相同时间戳信息的业务数据包称为一个同步序列，或称为一个同步序列，此后，将标记了时间戳信息数据包发送给归属于该上层网元的一个或多个下层网元。下层网元用于接收上层网元发送的各业务数据包 ,并根据各业务数据包的时间戳信息 , 计算开始发送一个同步序列的起始时间 , 在 RLC十办议层处理时，对同一个同步序列的数据包进行 RLC串接处理 , 并将经过了无线网络层用户面协议处理后的业务数据包在无线接口发送。为了提高在无线接口丢包情况下的同步恢复，下层网元在每个同步序列的开始进行 RLC复位 ,将 RLC 协议层序列重新开始分配。图 4是根据本发明实施例的上层网元和下层网元的逻辑结构框架图 ,如图 4所示，一个上层网元与多个下层网元相连接，进行信令交互。需要说明的是，一个上层网元和归属于该上层网元的一个或多个下层网元在物理功能上可以是相同的网元，也可以是不同的网元，将其分为上层网元和下层网元只是逻辑上的划分，为了协作完成业务同步这样一个功能，即若干个相同或不同的物理网元才艮据逻辑上的功能划分为一个上层网元和若干个下层网元 , 这些网元协同合作，在下层网元的小区间，实现以多小区合并方式发送的 MBMS业务。其中，上层网元和下层网元可以是下列网元的组合方式，但是不限于下列的组合：组合一，在通用陆地无线接入网（UTRAN ) 系统的 MBMS业务同步组网中，上层网元为上层网关通用分组无线业务支持节点（Gateway General Packet Radio Service Supporting Node, 筒称为 GGSN )、月务通用分组无线业务支持节点 ( Serving General Packet Radio Service Supporting Node, 筒称为 SGSN或者广播组播业务中心（Broadcast Multicast Service Center, 筒称为 BMSC ), 下层网元为下层无线网络控制器（ Radio Network Controller, 筒称为 RNC ), 其中，上层网元和下层网元间的接口为 lur接口，在该组合中，上层网元和下层网元为物理功能相同的网元。组合二，在增强的高速分组接入系统（HSPA + )的 MBMS业务同步组网中，上层网元为 GGSN、 SGSN或者 BMSC。下层网元为 RNC或者节点加 ( NB+ )。组合三 ,在长期演进系统（ Long-Term Evolution ,筒称为 LTE )的 MBMS 业务同步组网中，上层网元为多媒体广播组播业务网关（ MBMS Gateway , 筒称为 MGW ) 或者多小区 /组播协调实体 ( Multicell I Multicast Coordination Entity, 筒称为 MCE ), 下层网元为演进节点 B ( E-UTRAN NodeB )。方式实施例二图 5是根据本发明实施例的同步调度方法的流程图，如图 5所示，该方法包括以下步骤 (步骤 S502至步骤 S504 )。步骤 S502, 多个下层网元才艮据业务的同步序列长度、时分复用周期、以及预定规则确定调度传输时间间隔；步骤 S504, 多个下层网元按照确定的调度传输时间间 P 对业务的数据包进行调度处理。在具体实施过程中，多个下层网元通过系统配置获取同步序列长度；指定网元将同步序列长度通知给多个下层网元。多个下层网元通过系统配置获取时分复用周期；指定网元将时分复用周期通知给多个下层网元。多个下层网元通过系统配置获取预定规则；指定网元将预定规则通知给多个下层网元。其中，指定网元包括以下之一：上层网元、除多个下层网元之外的下层网元。优选地，多个下层网元才艮据业务的同步序列长度、时分复用周期、以及预定规则确定调度传输时间间隔包括：多个下层网元将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数。其中，同步序列长度为调度周期。通过本发明实施例提供的技术方案 ,进行同一业务的多个下层网元通过获得该业务的调度传输时间间隔，并对该业务采用相同的调度方法，相比于现有技术 , 能够避免对 MBSFN网络造成干扰和破坏 MBSFN条件。下面通过实例五和实例六来说明指定网元为除所述多个下层网元之外的下层网元时，本发明实施例的处理过程。实例五首先，作为指定网元的下层网元通过系统配置获取指定业务的同步序列长度和时分复用周期 , 该下层网元通过信令消息将获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则都发送为进行指定业务的各下层网元。之后，各下层网元获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则 , 并根据该规则确定指定业务的调度传输时间间隔 , 具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。各下层网元按照确定的调度传输时间间隔对接收到的业务同步序列进行调度处理。实例六首先，作为指定网元的下层网元归属的上层网元将同步序列长度通知给下层网元，并通过系统配置获取时分复用周期，该下层网元通过信令消息将获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则都发送为进行指定业务的各下层网元。之后，各下层网元获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则 , 并根据该规则确定指定业务的调度传输时间间隔 , 具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。各下层网元按照确定的调度传输时间间隔对接收到的业务同步序列进行调度处理。下面通过实例七和实例八来说明指定网元为上层网元时，本发明实施例的处理过程。实例七首先 ,上层网元通过系统配置获取指定业务的所述同步序列长度和时分复用周期，该上层网元通过信令消息将获取的同步序列长度和时分复用周期、以及才艮据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则都发送为进行指定业务的各下层网元。之后，各下层网元获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则 , 并根据该规则确定指定业务的调度传输时间间隔 , 具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。各下层网元按照确定的调度传输时间间隔对接收到的业务同步序列进行调度处理。实例八首先 ,作为指定网元的上层网元的下层网元将时分复用周期通知给上层网元，该上层网元可以通过系统配置获取同步序列长度。该上层网元通过信令消息将获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则都发送为进行指定业务的各下层网元。之后，各下层网元获取的同步序列长度和时分复用周期、以及根据同步序列长度和时分复用周期确定指定业务的调度传输时间间隔的规则 , 并根据该规则确定指定业务的调度传输时间间隔，具体地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的公倍数，优选地，可以将调度传输时间间隔设置为同步序列长度和时分复用周期的最小公倍数。各下层网元按照确定的调度传输时间间隔对接收到的业务同步序列进行调度处理。如上所述，借助于本发明提供的同步处理方法，进行同一业务的多个下层网元通过获得该业务的调度传输时间间隔 , 并对该业务采用相同的调度方法，相比于现有技术，能够避免对 MBSFN网络造成干 4尤和破坏 MBSFN条件。以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的^^申和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 (TDM period -1). Specifically, an MBMS service is sent within a TDM offset TTI from the TDM offset TTI, and the TDM repeat period is up to 9, and the MBMS service can be in the TDM period. The length of the TTI used is 40 or 80 ms. A service can only be sent on the radio interface during the available transmission time configured during the TDM period. When the data is transmitted in the TDM mode, the timing of the transmission of the MBMS service on the radio interface is discontinuous, but the cyclically occurs according to the configuration of the TDM. Due to the current scheduling method, the timestamp has uncertainty, so the timestamp The information may not directly correspond to the start time at which the wireless interface can send the MBMS service, that is, the timestamp and the wireless interface transmission opportunity (available transmission time) cannot correspond to, for example, the length of the synchronization sequence shown in FIG. Schematic diagram of TDM cycles that do not match. At present, in the MBMS synchronization system, in order to implement the service scheduling under the TDM multiplexing condition, a method for scheduling the received synchronization sequence by the lower layer network element according to the scheduled transmission time interval is proposed, wherein the scheduling transmission time interval length is a service A common multiple of the TDM period and the length of the synchronization sequence, and the lower layer network element transmits the synchronization sequence whose timestamp is within a scheduling time length in the next scheduled transmission time interval. In the above-mentioned synchronization system, a plurality of lower-layer network elements are synchronized, and a multicast broadcast single frequency network (MBSFN) is used to transmit an MBMS service. However, according to the current method, multiple lower-layer network elements are used. If the same scheduling transmission interval is not obtained, different lower-layer NEs can adopt different scheduling methods for the same service. This will cause the MBSFN network to be dry and destroy the MBSFN conditions. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that a plurality of lower layer network elements existing in the related art cannot obtain the same scheduled transmission time interval and causes interference to the MBSFN network, and the MBSFN condition is destroyed. Therefore, the main purpose of the present invention is to A synchronous scheduling method is provided to solve the above problem. According to an aspect of the present invention, a synchronization scheduling method is provided. According to the synchronization scheduling method of the present invention, the specified network element determines the scheduled transmission time interval of the service according to the length of the synchronization sequence and the time division multiplexing period of the service, and determines the scheduled transmission time interval. The data is sent to multiple lower-layer network elements. The multiple lower-layer network elements perform scheduling processing on the data packets of the service according to the scheduled transmission time interval. According to an aspect of the present invention, a synchronization scheduling method is provided. The synchronization scheduling method according to the present invention includes: a plurality of lower layer network elements determine a scheduling transmission time interval according to a synchronization sequence length, a time division multiplexing period, and a predetermined rule of the service; and the plurality of lower layer network elements according to the determined scheduling transmission time interval Scheduling the data packets of the service. Through the method provided by the present invention, multiple lower-layer network elements in the same service can obtain the scheduling time interval of the service, and adopt the same scheduling method for the service. Compared with the prior art, the MBSFN network can be avoided. 4 Yuhe destroys MBSFN conditions. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawings: FIG. 1 is a flowchart of an MBMS service synchronization processing method of a plurality of network elements according to the prior art; FIG. 2 is a schematic diagram showing an example of a synchronization sequence length and a TDM period mismatch according to the prior art; 3 is a flowchart of a synchronization scheduling method according to Embodiment 1 of the method of the present invention; FIG. 4 is a logical structural framework diagram of an upper layer network element and a lower layer network element according to an embodiment of the present invention; FIG. 5 is a method according to the method of the present invention. A flowchart of the synchronous scheduling method of the second example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic idea of the present invention is as follows: The MBMS service is transmitted in the MBSFN TDM mode because multiple lower-layer network elements are synchronized, but according to the current method, multiple lower-layer network elements cannot obtain the same scheduled transmission time. The interval may cause different lower-layer network elements to adopt different scheduling methods for the same service. Based on this, the present invention provides a synchronous scheduling method, where multiple lower-layer network elements of the same service obtain scheduled transmission of the service through designated network elements. The time interval, and the same scheduling method is used for the service to solve the above problem. The invention will be described in detail below with reference to the accompanying drawings. Method Embodiments According to an embodiment of the present invention, a synchronization scheduling method is provided. It should be noted that, for convenience of description, the technical solutions of the method embodiments of the present invention are shown and described in the following steps, and the steps shown below may be in a computer system such as a set of computer executable instructions. carried out. Although the logical order is shown in the associated figures, in some cases the steps shown or described may be performed in a different order than the ones described herein. FIG. 3 is a flowchart of a synchronization scheduling method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps (steps S302 to S304). Step S302: Specify a network element synchronization sequence length and a service time division multiplexing period to determine a scheduled transmission time interval of the service, and send the determined scheduling transmission time interval to the plurality of lower layer network elements; Step S304, the multiple lower layer network elements follow The scheduling transmission time interval performs scheduling processing on the data packets of the service, wherein the synchronization sequence length may also be referred to as a scheduling period. The specified network element includes one of the following: an upper-layer network element, and a lower-layer network element except for multiple lower-layer network elements. It should be noted that the foregoing scheduled transmission time interval may be for a certain service, or may set the same scheduled transmission time interval for all services. According to the technical solution provided by the embodiment of the present invention, multiple lower-layer network elements in the same service obtain the scheduled transmission time interval of the service, and adopt the same scheduling method for the service, which can avoid MBSFN compared to the prior art. The network causes interference and disrupts MBSFN conditions. The following describes the processing procedure of the embodiment of the present invention when the specified network element is the lower layer network element except the multiple lower layer network elements. Instance 1 First, the lower layer network element that is the designated network element obtains the synchronization sequence length and the time division multiplexing period of the specified service by using the system configuration, and the lower layer network element obtains the specified service according to the obtained synchronization sequence length and the time division multiplexing period of the service. The scheduling transmission time interval, specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling may be adjusted. The degree of transmission interval is set to the least common multiple of the synchronization sequence length and the time division multiplexing period. Then, the lower layer network element sends the determined scheduling transmission time interval to the lower layer network element for performing the specified service by using the signaling message, and each lower layer network element schedules the received service synchronization sequence according to the received scheduled transmission time interval. deal with. Instance 2 First, the upper-layer network element that belongs to the lower-layer network element of the specified network element notifies the lower-layer network element of the synchronization sequence length, and obtains the time-division multiplexing period through system configuration. The lower layer network element obtains the scheduled transmission time interval of the specified service according to the obtained synchronization sequence length and the time division multiplexing period of the service. Specifically, the scheduling transmission time interval may be set to the synchronization sequence length and the time division multiplexing period. A common multiple, preferably, the scheduled transmission time interval can be set to the least common multiple of the synchronization sequence length and the time division multiplexing period. Then, the lower layer network element sends the determined scheduling transmission time interval to the lower layer network element for performing the specified service by using the signaling message, and each lower layer network element schedules the received service synchronization sequence according to the received scheduled transmission time interval. deal with. The following describes the processing procedure of the embodiment of the present invention when the specified network element is the upper layer network element. Example 3 First, the upper layer network element obtains the synchronization sequence length and the time division multiplexing period of the specified service by using the system configuration, and the upper layer network element is specified according to the obtained synchronization sequence length and the time division multiplexing period of the service. The scheduling transmission time interval of the service may be specifically set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling transmission time interval may be set to a minimum of the synchronization sequence length and the time division multiplexing period. common multiple. Then, the upper layer network element sends the determined scheduling transmission time interval to the lower layer network element for performing the specified service by using the signaling message, and each lower layer network element schedules the received service synchronization sequence according to the received scheduled transmission time interval. deal with. In the fourth embodiment, the lower layer network element that is the upper layer network element of the specified network element notifies the upper layer network element of the time division multiplexing period, and the upper layer network element can obtain the synchronization sequence length through the system configuration. The upper layer network element is obtained according to The scheduled transmission time interval of the specified service is calculated by the length of the synchronization sequence and the time division multiplexing period of the service. Specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the The scheduled transmission time interval is set to the least common multiple of the synchronization sequence length and the time division multiplexing period. Then, the upper layer network element sends the determined scheduling transmission time interval to the lower layer network element for performing the specified service by using the signaling message, and each lower layer network element schedules the received service synchronization sequence according to the received scheduled transmission time interval. deal with. The upper network element and the lower layer network element are described below. The upper layer network element is configured to complete the scheduling of the received MBMS service data packet. Specifically, the upper layer network element marks the timestamp information of each service data packet, and refers to the service data packet marked with the same timestamp information as a synchronization sequence. , or a synchronization sequence, after which the timestamp information packet is sent to one or more lower layer network elements belonging to the upper layer network element. The lower layer network element is configured to receive each service data packet sent by the upper layer network element, and calculate a start time for starting to send a synchronization sequence according to the timestamp information of each service data packet, and the same time is processed by the RLC ten management layer. The data packet of the synchronization sequence is subjected to RLC concatenation processing, and the service data packet processed by the radio network layer user plane protocol is transmitted on the radio interface. In order to improve the synchronization recovery in the case of packet loss on the radio interface, the lower layer network element performs RLC reset at the beginning of each synchronization sequence, and the RLC protocol layer sequence is restarted. FIG. 4 is a logical structural diagram of an upper layer network element and a lower layer network element according to an embodiment of the present invention. As shown in FIG. 4, an upper layer network element is connected to multiple lower layer network elements for signaling interaction. It should be noted that an upper layer network element and one or more lower layer network elements belonging to the upper layer network element may be the same network element in physical function, or may be different network elements, and are divided into upper layer network elements. The lower-layer network element is only logically divided. In order to cooperate to complete the service synchronization function, a plurality of the same or different physical network elements are divided into an upper layer network element and a plurality of lower layer network elements according to logical functions. The network elements cooperate to implement the MBMS service sent by the multi-cell combination mode between the cells of the lower layer network element. The upper layer network element and the lower layer network element may be a combination of the following network elements, but are not limited to the following combinations: Combination one, in the MBMS service synchronization network of the universal terrestrial radio access network (UTRAN) system, the upper layer network element General Packet Radio Service Support Node for Upper Gateway (Gateway General Packet Radio Service Supporting Node (called GGSN), the General Packet Radio Service Supporting Node (SMS) or the Broadcast Multicast Service Center (BMSC) The lower layer network element is a lower layer radio network controller (Radio Network Controller, which is called an RNC). The interface between the upper layer network element and the lower layer network element is a lur interface. In this combination, the upper layer network element and the lower layer network element are The network element with the same physical function. In combination 2, in the enhanced high-speed packet access system (HSPA + ) MBMS service synchronization network, the upper layer network element is GGSN, SGSN or BMSC. The lower layer network element is RNC or node plus (NB+ In combination, in the MBMS service synchronization network of the Long-Term Evolution (Long-Term Evolution), the upper-layer network element is a multimedia broadcast multicast service gateway (MBMS Gateway, called MGW) or multi-cell. Multicast I Multicast Coordination Entity (MCE), and the lower layer NE is E-UTRAN NodeB. Embodiment 2 FIG. 5 is a flowchart of a synchronization scheduling method according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps (steps S502 to S504). Step S502, multiple lower-layer network elements are used according to the service. The synchronization sequence length, the time division multiplexing period, and the predetermined rule determine the scheduling transmission time interval. Step S504, the plurality of lower layer network elements perform scheduling processing on the data packets of the service according to the determined scheduling transmission time P. In a specific implementation process, The plurality of lower-layer network elements obtain the synchronization sequence length through the system configuration. The specified network element notifies the multiple lower-layer network elements of the synchronization sequence length. The multiple lower-layer network elements obtain the time-division multiplexing period through the system configuration; the specified network element uses the time-division multiplexing period. The plurality of lower-layer network elements are obtained by the system configuration. The specified network element is configured to notify the plurality of lower-layer network elements. The specified network element includes one of the following: The lower layer network element except the lower layer network element. Preferably, the plurality of lower layer network elements are based on the synchronization sequence length of the service and the time division multiplexing week. And the predetermined rule determining the scheduled transmission time interval comprises: the plurality of lower layer network elements setting the scheduled transmission time interval to a common multiple of the synchronization sequence length and the time division multiplexing period. The length of the synchronization sequence is a scheduling period. According to the technical solution provided by the embodiment of the present invention, multiple lower-layer network elements in the same service obtain the scheduled transmission time interval of the service, and adopt the same scheduling method for the service, which can avoid MBSFN compared to the prior art. The network causes interference and disrupts MBSFN conditions. The following describes the processing procedure of the embodiment of the present invention when the specified network element is the lower layer network element except the multiple lower layer network elements. Example 5 First, the lower layer network element that is the designated network element obtains the synchronization sequence length and the time division multiplexing period of the specified service through the system configuration, and the synchronization layer length and the time division multiplexing period obtained by the lower layer network element by using the signaling message, and according to The rules of the synchronization sequence length and the time division multiplexing period to determine the scheduled transmission time interval of the specified service are sent as the lower layer network elements for performing the specified service. Then, a synchronization sequence length and a time division multiplexing period acquired by each lower layer network element, and a rule for determining a scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period, and determining a scheduled transmission time interval of the specified service according to the rule Specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling transmission time interval may be set to a minimum common multiple of the synchronization sequence length and the time division multiplexing period. Each lower layer network element performs scheduling processing on the received service synchronization sequence according to the determined scheduling transmission time interval. Example 6 First, the upper-layer network element that belongs to the lower-layer network element of the specified network element notifies the lower-layer network element of the synchronization sequence length, and obtains the time-division multiplexing period through the system configuration, and the synchronization sequence that the lower-layer network element acquires through the signaling message The length and time division multiplexing period, and the rules for determining the scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period are all sent as the lower layer network elements for performing the specified service. Then, a synchronization sequence length and a time division multiplexing period acquired by each lower layer network element, and a rule for determining a scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period, and determining a scheduled transmission time interval of the specified service according to the rule Specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling transmission time interval may be set to a minimum common multiple of the synchronization sequence length and the time division multiplexing period. Each lower layer network element performs scheduling processing on the received service synchronization sequence according to the determined scheduling transmission time interval. The following describes the processing procedure of the embodiment of the present invention when the specified network element is the upper layer network element. Example 7 First, the upper layer network element obtains the synchronization sequence length and the time division multiplexing period of the specified service by using the system configuration, and the upper layer network element synchronizes the acquired synchronization sequence length and the time division multiplexing period and the data according to the signaling message. The sequence length and the time division multiplexing period are used to determine the scheduling time interval of the specified service. Then, a synchronization sequence length and a time division multiplexing period acquired by each lower layer network element, and a rule for determining a scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period, and determining a scheduled transmission time interval of the specified service according to the rule Specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling transmission time interval may be set to a minimum common multiple of the synchronization sequence length and the time division multiplexing period. Each lower layer network element performs scheduling processing on the received service synchronization sequence according to the determined scheduling transmission time interval. Instance 8 First, the lower layer network element that is the upper layer network element of the specified network element notifies the upper layer network element of the time division multiplexing period, and the upper layer network element can obtain the synchronization sequence length by using the system configuration. The upper layer network element sends the acquired synchronization sequence length and the time division multiplexing period, and the rules for determining the scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period, by using the signaling message, as the lower layer network for performing the designated service. yuan. Then, a synchronization sequence length and a time division multiplexing period acquired by each lower layer network element, and a rule for determining a scheduled transmission time interval of the specified service according to the synchronization sequence length and the time division multiplexing period, and determining a scheduled transmission time interval of the specified service according to the rule Specifically, the scheduling transmission time interval may be set to a common multiple of the synchronization sequence length and the time division multiplexing period. Preferably, the scheduling transmission time interval may be set to a minimum common multiple of the synchronization sequence length and the time division multiplexing period. Each lower layer network element performs scheduling processing on the received service synchronization sequence according to the determined scheduling transmission time interval. As described above, with the synchronization processing method provided by the present invention, multiple lower-layer network elements performing the same service obtain the scheduled transmission time interval of the service, and adopt the same scheduling method for the service, compared to the prior art. It can avoid causing interference to the MBSFN network and destroying MBSFN conditions. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A synchronization scheduling method, comprising:

Determining, by the network element, the scheduled transmission time interval of the service according to the synchronization sequence length and the time division multiplexing period of the service, and transmitting the determined scheduling transmission time interval to the plurality of lower layer network elements;

And the plurality of lower layer network elements perform scheduling processing on the data packets of the service according to the scheduled transmission time interval.

2. The method according to claim 1, wherein the method further comprises:

The designated network element acquires the synchronization sequence length of the service and the time division multiplexing period of the service according to a predetermined rule.

The method according to claim 2, wherein the specified network element comprises one of: an upper layer network element, and a lower layer network element except the plurality of lower layer network elements;

The upper layer network element includes one of the following: a multimedia gateway of a long term evolution system, a gateway GPRS support node of a universal terrestrial radio access network, a serving GPRS support node, a multimedia broadcast control center, and a primary NB+ of the enhanced high speed packet access system,

The lower layer network element includes one of the following: an ENB of a long term evolution system, a slave radio network controller of a universal terrestrial radio access network, and a secondary NB+ of an enhanced high speed packet access system.

The method according to claim 3, wherein if the specified network element is an lower layer network element other than the plurality of lower layer network elements, the synchronization sequence length of the service is obtained according to a predetermined rule. The time division multiplexing period of the service includes:

Obtaining, by the system configuration, the synchronization sequence length and the time division multiplexing period as the lower layer network element of the designated network element; or

And the upper layer network element to which the lower layer network element of the specified network element belongs to notify the lower layer network element of the synchronization sequence length, and obtain the time division multiplexing period by using a system configuration; The upper layer network element to which the lower layer network element belongs notifies the length of the synchronization sequence to the lower layer network element, and calculates the time division multiplexing period by using a system configuration.

5. The method according to claim 3, wherein if the designated network element is the upper layer network element, the synchronization sequence length of the service is obtained according to a predetermined rule and the time division multiplexing of the service The cycle includes:

Obtaining, by the system configuration, the synchronization sequence length and the time division multiplexing period by the upper layer network element of the designated network element; or

The lower layer network element of the upper layer network element of the specified network element notifies the time division multiplexing period to the upper layer network element, and obtains the synchronization sequence length by using a system configuration.

The method according to any one of claims 1 to 5, wherein the designated network element determines a scheduled transmission time interval of the service according to the synchronization sequence length and the time division multiplexing period. Includes:

The scheduled transmission time interval is set to a common multiple of the synchronization sequence length and the time division multiplexing period.

The method according to any one of claims 1 to 5, wherein the synchronization sequence length is a scheduling period.

8. A synchronization scheduling method, comprising:

Determining, by the plurality of lower layer network elements, the scheduled transmission time interval according to a synchronization sequence length, a time division multiplexing period of the service, and a predetermined rule;

And the plurality of lower layer network elements perform scheduling processing on the data packets of the service according to the determined scheduling transmission time interval.

The method according to claim 8, wherein the method further comprises:

The plurality of lower layer network elements acquire the synchronization sequence length, the time division multiplexing period, and the predetermined rule by using a system configuration; or

The designated network element notifies the plurality of lower layer network elements of the synchronization sequence length, the time division multiplexing period, and the predetermined rule.

The method according to claim 9, wherein the specified network element comprises one of: an upper layer network element, and a lower layer network element except the plurality of lower layer network elements;

The upper layer network element includes one of the following: a multimedia gateway of a long term evolution system, a gateway GPRS support node of a universal terrestrial radio access network, a serving GPRS support node, a multimedia broadcast control center, and a primary NB+ of the enhanced high speed packet access system, The lower layer network element includes one of the following: an ENB of a long term evolution system, a slave radio network controller of a universal terrestrial radio access network, and a secondary NB+ of an enhanced high speed packet access system.

The method according to any one of claims 8 to 10, wherein the plurality of lower layer network elements determine the scheduled transmission according to a synchronization sequence length of a service, a time division multiplexing period, and a predetermined rule. The time interval includes:

The plurality of lower layer network elements set the scheduled transmission time interval to a common multiple of the synchronization sequence length and the time division multiplexing period.

The method according to any one of claims 8 to 10, wherein the synchronization sequence length is a scheduling period.